Latch



LAN

LATC

.2.- sheet eet 1 Filed June NVENTOR G/e y, afld BY ATTORNEY ZEMWW G. HCJLLAND may 5%, 195% LATCH 2 Sheets-sheet 2 Filed June 24, 194.4, il-

IN ENTOR G/efl BY Patented May 30, 1950 ample LATCH Glen Holland, Bronxville, N. Y., assignor to The Yale & Towne Manufacturing Company, Stamford, Conn, a corporation of Connecticut Application June 24, 1944, Serial No. 541,940

Claims.

This invention relates to a latch of the type adapted to be applied to a door, and preferably to be operated by inside and outside handles.

It is the object of this invention to contribute a latch equipped with pivoting inside and outside handles, and having suitable controls for rendering the outside handle ineffective to open the door to which the latch is applied while leaving the inside handle always effective.

It is the further object of the invention to contribute a latch having pivoting handles, in which the means that render the outside handle ineffective are automatically released upon either the closing movement of the door or upon operation of the inside pivoting handle.

One feature of my invention whereby the objects thereof are achieved, resides in the utilization of pivoting handles and a, latchbolt retracted by said pivoting handles, together with a dog for rendering the outside handle ineifective, the said dog being movable at all times into a retracted position by the inside handle, and preferably also by the strike.

A further feature of my invention resides in the utilization of a dog that is cooperative with the same strike with which the latchbolt interlocks, both the dog and latchbolt being retractable by the inside handle, while merely the latchbolt is retractable by the outside handle.

A further feature of my invention resides in the manner in which the dog and latchbolt are mounted on a door for control by the inside and outside handles. A still further feature of this portion of my invention resides in the novel means of connection between the outside handle and the latchbolt, and the inside handle and latchbolt, whereby the entire latch assembly is readily applied to a door with a minimum of effort.

I have thus described the more important aspects and features of my invention in order that the description that follows may be more readily understood. However, there are several addi-- tional features which will be particularly referred to in the specification and which will form the subject matter of certain of the claims appended hereto. Those knowing the art will appreciate that I have made a contribution of considerable breadth to the art, and that those skilled in the art will readily develop latching structures utilizing the basic principles of my contribution but in other forms of mechanisms. I do not therefore wish to be limited to the particular structures I have herein set forth embodying my in vention. i

Referring now to the drawings, Fig. 1 is a perspective view showing my latch as it appears from the inside of the door to which it is applied. Fig. 2 illustrates the latch as it appears from the outside of the door to which it is applied. Fig. 3 is a horizontal section through the door nd latch showing the latchbolt in latching position and the dog in release position. Fig. 4 is a view of the parts of Fig. 3 showing the latchbolt released through movement of the outside handle and illustrating the action that takes place under operation of the inside handle. Fig. 5 is a section taken along lines 5-5 of Fig. 3. Fig. 6 is a view of the parts of Fig. 3 showing the dog in dogging position. Fig. 7 is a view showing the manner in which the dog is moved to release position by the strike upon closing movement of the door. Fig. 8 is a perspective view of the inside mounting member.

Referring now more particularly to the drawings, and especially Figs. 1, 2 and 8, reference numeral I 0 refers to an inside mounting member while reference numeral H indicates an outside mounting member. Member I0 is secured to'the door by screws traversing bores in its ears Hia,

while outside mounting member II is secured to the door by screws traversing bores in its ears i la. The outside mounting supports a shaft l2, and pivoted on shaft I2 is an outside handle l3. The inside mounting member supports a shaft I4 and pivoted on shaft [4 is an inside handle I 5..

As is well illustrated in Figs. 3, 4 and 5, both the inside and outside handles are channel shaped preferably, at least where the pivot shafts I2 and I4 traverse the said handles. As a mat ter of interest, I prefer to manufacture the handles l3 and [5 from some plastic material although the' handles may be made from metal, as those skilled in the art will appreciate. Similarly, the latchbolt and dog to be hereinafter set forth may be made from plastic or metal, as may prove desirable.

In addition to the inside handle Hi, there is mounted on the pivot shaft Hi of the inside mounting member it, a latchbolt l6 and a dog 2 It is of course seen that the flanges [5a. and I51) of the inside handle l5 lie directly against the inside surfaces of a lower plate l8 and an upper plate [9 of the inside mounting member [0 as best shown in Fig. 5. Latch bolt l6 will lie between the lower flange I 5b of the handle l5 and a central plate ll of member ill. Between the upper flange I511. of the handle 15, and the central plate ll, there will lie the dog 29 as probably best shown in Fig. 5. Both the bolt l6 and the dog 20 will of course rotate about the same shaft M on which the handle i5 is rotatable.

A spring 2| is coiled about the shaft IE and lies within a slot 22 in the latchbolt I6. It has one leg 23 pressing against the back plate 24 of the mounting member ll], while its other leg presses against the bottom surface of the slot 22. From the several figures of the drawings, it is readily perceived that the spring 2| willurge the latchbolt [6 into its latching position of Fig. 3, wherein it is shown in cooperation with a strike 25. A shoulder 26 on the latchbolt l6 cooperates with a surface 27 of the handle I5 whereby to urge the handle into'its po's'ition of Fig. 3. In other words, the same spring 2l that; a

maintains the latchbolt It in its latching position, serves also to maintaimthe handle -.l5-= in its normal position of Figs. 1 and 3. Through cooperation of shoulder 26 and surface 21, latchbolt [6 is retractable from its position of Fig. l .to'; its position .ofr-Fig: 4,;- upon swinging :movern enlt oi 17h? handle 1;] ,5: from iits :li-ne position in Figs. '1 :and .4, {to itsdash and dottedf line. .position in-Fig; 4,:;all=as will be.quite;apparent.

' Incolder.:towmakecitepossible 1to retract r-the latchbolt- I6 .113 the, outsideihandlexl3,:the door D is formed azsmall .bore #30. I'Ridingl within this e,bre=;is a t 18ViS3I having. a-slotand pm Qonnfi fionaeati :32- With slthe-cioutside .handle ;-I 3. The clevis :3 i.- .-is;;fQX!med with a sleevepontionfi33 thatris idlf-illedzand tapped .as lat 3.4;ior cooperation; with: afihIlBEtdGdmbOlt :35. :ithat .is rpivotally flill f edratifasgii) thelatchboltl 6.=. .It will Joe readily -sapp fi atfid by zthoselrskil ed in the, art that in order vtozapply {to a doorsthe latohing.;meohan-ism; thus ff-ar; described; theninside -,.a-nd :ou'tside mounting me hers are; firstyselcured ito -the door as by sere wspassipg thronghjhe holes-in the ears lfla and Ha. By suitably rotatingtheplevis 3 I and; ;-i-ts sleevemention 533;relatively to; the threaded bolt; 35 it is thus possibleto, a d'just; the connection-betweentheoutside handle 3- and the nsidenlat hbo t i i-" ac zpa ie laredoor rthicknessso3thatfyvith; the outsigde handle-inaits position of- Eig. 1,;thedatchholtellirwillbe-in latching position. The connection at 3 2;. b etweenthe elevis an h nd e I3. m y; n'b zmad NMmaHwa l-WW. win in movement of *the outside handle ls from; position ofr'Ffig. 3toits position ,.of;; Fig. 4 will retract the :latchbolt against the pressure of; theespring- 2 I. 1 'Inr'other words,=from the description so :far, advanced; it is readily seenyth-at- *thEjlfltChbOlt 1 6 is retractabla-hyeithertheinside handle I .or'the outside handle .43. atzall :times. It=isxalsoereadily [perceivedrthat in;-or.der; to :make: the connection. between the outside handle and the latohbolt it is.-.only-necessary; to .bore asmallih'ole inthe Joloor, and'thatitdsanotnecessary to mortise the door in :any way :for the application =of' the inside and outside mountingemembers.

The dog 20 has already been re'ferredto genera-lly and has-been indicated as being mounted about the shaft 14 andbetweenthe upper flange 15a, of the inside handle 15 and the central plate l'ihof theinsid e mounting member it]. The dog may be called a dogging latchbolt and is formed for cooperation with strike" ers best illustrated in Fig. 6. As a matter of fact; it will cooperate with the strike '25 in substantiallythe same manner asdoes the latchbolt i 6;-whereupon it will lock the door D against opening movement just as does the latchbolt [6.

The dog 29 -is preferablymaintained irreither a release position or adogging position by aball of Fig. 3. *By suitable pressure appl ied to a finger piece 45, preferably forming an integral part of the dog 20, the dog may be moved from its 1 position of Fig. 3 to its position of Fig. 6.

In its position of Fig. 6 the dog 29 will co- This is due will operate the latchbolt IE but will not in any way-disturb the dog 20., and the dog 29 will remain in its position of" Fig. 6, in which position it; is retainedibyfithe balliflll lying iwithim the .bore #3 :ofthe nplate J1. t- Movement ofx. :the'rin'si'de handle 1 5 fromsl.-its=xposition zofeFig. 6 to its ;dash and (dotted :position I of "Fig. l. will retrac't f'the latchbolt :II 6;. :and will i simultaneouslyrmove the dog. :20 to its releases-position. of -l ig;v 1. .lh'Ihis movement of the dog willebelcontributed through contact for the handle 5 ifiz'w-ith the xfinger; piece 45 of the dog. ""Thereaftergthe idog willzremain in its releasexpositionzsbecause the-ball? .*will have .enterewthe hole 544. in thgipla-te i I I :of "the mounting memberzilli.

. :Should the door he openand should the-dog 26 be in 1 its :position 01; Fig 6 relatively to the r-re maining parts of the latchg it is important that the dog be releasedas' the door is clos'ed Otherwise, 1 it may be -pos's'ible for someone toflloc'k himselfout "of a room, .all as irequently 'happens. J :I have therefore provided means whereby: the dog 2611s moved :to re'leaseipositon:upon closingmovementofthe door, itpriorto the closing movement of the idoor t-he dogtha's been :placed inadvertently in dogging position. Thus, as illustrated: in Fig. 7 the .dog will :im'pinge :a'gainstX thevstrike: duringi'closing movement er I the door; and will-sbe moved byithe strike "from lits-position iof 6 to itslposition of -Fig. ..relatively-'.to. latch structure. Itiisithus rea ly seenthatflm my -linvention the dog isflat Pallitimes retractable=by the inside. handle incidental to the retraction of the latchbolt; and -t'hats'the -.-dog is= further -a'ut'omatically :retracted by the closing'movement of the door.

I believe that the operation-and construction of my invention will now be appreciated by those skilled i'n the art. V

-I now claim: V

- L'In alatch of the-class described, an inside handle, means mounting said handle for pivotal movement; an outside hafidlameans-mounting said outside handle for pivotal movement; a latchbolt, 'means whereby --said* latchb'olt "is" retracted from engagement with astrike'by pivotal movement of said outside handle and also said inside handle, a dogging-latchbolt, means'mounting said dogging latchbolt for" pivotal movement between a dogging andrelease position on a'pivot parallel to the a'Xis-onwhich'said inside handle is pivotally'mountedpand means on said inside handle impinging againsta'su'rfaceof 'said dogging latchbolt"whereby said dogging 'latchbolt is moved froma dogging to a 'releasepo'sitionby saidins'ide' handle; said; dogging latchb'olt being inoperativeby the "outside" handle.

2. In a latch of the class described, alatchbolt, means pivotally mounting said latchbolt for movement from a latching to a release position, an inside and an outside handle, means mounting said inside and outside handles for pivotal movement on pivots parallel to the pivotal mounting of said latchbolt, means whereby either of said handles retracts said latchbolt, a dog, means mounting said dog for movement from a dogging to a release position, and means whereby said dog is moved from a dogging to a release position incidental to the retraction of said latchbolt by saidinside handle.

3. In a latch of the class described, a main latchbolt, an inside handle, an outside handle a dog, means mounting said inside handle, latchbolt and dog for pivotal movement on parallel axes, means whereby said inside handle retracts said latchbolt and dog from a latching and dogging position respectively to a release position, and means whereby the outside handle retracts only said main latchbolt.

4. In a latch of the class described, a main latchbolt, an inside handle, an outside handle, means pivotally mounting said latchbolt and handles for pivotal movement on parallel axes, a dog, means whereby said dog is moved from a release position to a dogging position, means whereby said inside handle retracts said latchbolt and dog from a latching and dogging position respectively to a release position, and means whereby the outside handle retracts only said main latchbolt.

5. In a latch of the class described, a main latchbolt, an inside handle, an outside handle, a dogging latchbolt, means mounting said handles and latch bolts for pivotal movement on parallel axes, a spring pressing said main latchbolt to latching position, means for moving said dogging latchbolt from a release to a dogging position, means whereby said inside handle retracts said latchbolts from a latching and dogging position respectively to a release position, and means whereby the outside handle retracts only said main latchbolt.

6. In a latch of the class described, a main latchbolt, an inside handle, an outside handle, a dogging latchbolt, means whereby said dogging latchbolt is yieldingly retained in a release position until moved to a dogging position, means whereby said inside handle retracts said latchbolts from a latching and dogging position respectively to a release position, and means whereby the outside handle retracts only said main latchbolt, said dogging latchbolt being shaped so that when it contacts a cooperating strike while in dogging position, it will be cammed by said strike into release position.

7. In a latch of the class described, a main latchbolt, an inside handle, an outside handle, a dogging latchbolt, means whereby said dogging latchbolt is yieldingly retained in a release position and in a dogging position, means whereby said inside handle retracts said latchbolts from a latching and dogging position respectively to a release position, and means whereby the outside handle retracts only said main latchbolt, said dogging latchbolt being shaped so that when it contacts a cooperating strike while in dogging position, it will be cammed by said strike into release position.

8. In a latch of the class described, a main latchbolt, an inside handle, an outside handle, a dogging latchbolt, means whereby said dogging latchbolt is moved from a release position to a dogging position, means whereby said dogging latchbolt is yieldingly retained in a release position and in a dogging position, means whereby said inside handle retracts said latchbolts from a latching and dogging position respectively to a release position, and means whereby the outside handle retracts only said main latchbolt, said dogging latchbolt being shaped so that when it contacts a cooperating strike while in dogging position it will be cammed by said strike into release position.

9. In a latch of the class described, a mounting member for application on the inside surface of a door, a latchbolt pivoted on said mounting member for cooperation with a strike, a dog pivoted on said inside mounting member independently of said latchbolt, an inside handle also pivoted on said inside mounting member, an outside mounting member for application on the outside surface of the door, an outside handle pivoted on the said outside mounting member, means of connection between said latchbolt and said outside handle extending through a bore in the door to connect said latchbolt and outside handle for movement together at all times: whereby pivotal movement of said outside handle retract said latchbolt, means whereby said inside handle retracts said dog, and means whereby said inside handle also retracts said latchbolt.

10. In a latch of the class described, a mounting member for application on the inside surface of a door, a latchbolt pivoted on said mounting member for cooperation with a strike, an inside handle also pivoted on said inside mounting member, an outside mounting member for application on the outside surface of the door, an outside handle pivoted on the said outside mounting member, means of connection between said latchbolt and said outside handle extending through a bore in the door whereby pivotal movement of said outside handle retracts said latchbolt, a dogging latchbolt also pivoted on said inside mounting member and adapted also for cooperation with a strike to maintain said door locked even when said main latchbolt is retracted, and means whereby said inside handle retracts both said dogging latchbolt and said main latchbolt from cooperation with said strike.

11. In a latch of the class described, a mounting member for application on the inside surface of a door, a latchbolt pivoted on said mounting member for cooperation with a strike, an inside handle also pivoted on said inside mounting member, an outside handle pivoted on the said outside mounting member, means of connection between said latchbolt and said outside handle extending through a bore in the door whereby pivotal movement of said outside handle retracts said latchbolt, a dogging latchbolt also pivoted on said inside mounting member and adapted also for cooperation with a strike to maintain said door locked even when said main latchbolt is retracted, and means whereby said inside handle retracts both said dogging latchbolt and said main latchbolt from cooperation with said strike, said dogging latchbolt being shaped so that when it contacts a cooperating strike while in a dogging position it will be cammed to a retracted position.

12. In a latch of the class described, a latchbolt, means pivotally mounting said latchbolt for movement from a latching to a release position, an inside and an outside handle, means mounting said inside and outside handles for independent pivotal movement on independent axes, means whereby either of said handles retracts said latch- 7' bolt, a dog, means pivotally mounting said dog ion-movement from a' dogging to: a'releaseposition, and means whereby said inside handle moves said dogifrom a dogging to a release position.

13. Ina latch of the class: described, a latchbolt, means pivotally mounting-said latchbolt for movement from. a iatching to a release position, Ianins'ide and an outside handle, means mounting Isaidinsideandoutside handlesfor pivotal moveimentgrmeans whereby either of said handles retracts said latchbolt, a dog, means mounting said dogior movement from a dogging to a release position, :means whereby said dog moves from a doggingttoa release positionnpon retraction of said latchboltz'by said insidehandle, said-latchb'oltand'dog being adapted for cooperation with a istrike;and said dog being shaped for movement fromia doggingposition to a retracted position through contact with the strike if moved with the: door against the strike while in dogging position.

'14. In a latch of the class described, a latohbolt, means pivotally mounting said latchbolt for movement from a latching to a release position, aninside and anoutside handle, means mounting said inside andoutside handles-for pivotal movement, means whereby either of said handles retracts said latchbolt, a dog, means whereby said dog is yieldingly held in either a dogging or a release position when moved to one of said positions, means mounting said dog for movement from a dogging to a release position, and means whereby said inside handle moves said dog from a d'ogging to arelease position when retracting said latchbolt, said latchbolt and dog being adapted for latching cooperation with a strike, and "said dog being shaped for movementfrom a doggingposition to a retracted position through contact with the strike if moved with the door against the strike while in dogging position.

15. In a latch of the class described, a main latchbolt, an inside and an outside handle, a spring projecting said main latchbolt into latching cooperation with a strike, means whereby said mainlatchbolt is retracted out of latching cooperation with said strike at all timesby either of'said handles, a dogging latchbolt, means yieldingly retaining said dogging latchbolt in a dogging position and also in a-release position, and means mounting said dogging latchb'olt for movement into and out of dogging cooperation with said. strike independently of said main latchbolt and saidoutside handle while leaving said main latchbolt retractible by both said handles.

16. In a latch of the class described, a main latchbolt, an inside and an outside handle, a spring projecting said main latchbolt into latchingcooperation with a strike,means whereby said main ilatchbolt is retracted out of latching cooperation with said strike at all times by either of said handles, a dogging latchbolt,-means yieldingly retaining said dogging latchbolt in a dog-- ging position and also in a release position, means mounting s id dogging latchbolt for movement into and out of dogging cooperationwith said strike while leaving said main latchbolt retractiblev by both said handles, and means whereby said dogging latchbclt is retracted from dogging position by said insidehandle or by said strike through contact withthe strike while in dogging position.

:17; In a latch of :theclass described,-armunting member adapted for application to the face of a door; a'main and a dogging latch-bolt pivoted onsaid mounting member for movement into latchingcooperation with a strike, a-springzpressing said mainlatchbolt toward latching cooperation with said strike, and means whereby said dogging latchboit is yieldingly held relatively to said mounting member in latching or out of latching position. 7

'18; In a latch of the class described, a'main latchbolt, an inside and an outside handle, a spring projecting said main 'latchbolt into-latching cooperation'with a strike, means whereby said main latch-bolt is retracted out of latching cooporation with said strike by either of saidhandles, a dogging latchbolt, a part ofsaid dogging latchbolt being accessible for manual movement of said dogging latchboltinto latchingcooperation with said strike, and=means whereby :saidrinside handle moves said dogging latchboltand -main latchbolt out of said latching cooperation.

19. In a latch-oi the classdescribed, a main latchbolt, an inside and anoutside handlepa spring projectlng'said mainlatchbolt into latching cooperation with a strike, means whereby'said main latchbolt is retracted out of latching cooperation withsaid'strike by either of said. handles, a dogging latchbolt, a partof said dogging latchbolt being'accessi-ble for manualmovement of dogging latehbolt into latching cooperation with said strike, means whereby said insidehandle moves said dogging latchbolt and-main latchb'olt out of said latching cooperation, and means whereby said dogging -latchbolt is thereafter maintained out of latching cooperation with said strike.

20. In a latch of theclass described, a mounting member adapted for application tothe inside face of a door, a latchbolt pivoted on said mounting member, a spring-pressing :said latchbolt to latching position, a handle pivoted on said mountingwmember a part of said latclibolt pressing against said handle to urge thehandle to an initial position; said handle through said, part moving said iatchbolt out of latching position; a-dog also pivoted on said mounting member, and means whereby said handle also retracts said-dog from dogging position.

'GLEN HOLLAND.

REFERENCES CITED The following references are of record in the file of this patent:

'JUIJITED STATES PATENTS Number Name Date 1 746,061 Stout Sept. 29,- 1903 1,331,166 Ochsner Feb. 17, 1920 1,415,104 Meyer May 9, 1922 1,629,614 Devereaux May 24, 1927 1,964,058 I-Ioltzman 1 June 26, 1934 2,012,732 Schmiclgall Aug. 27, 1935 2,178,530 Rightmyer Oct. 31,1939 2,203,817 Ferris June 11,, 1940 2,311,685 Olson Feb. 23,- 1943 2,321,724 Aldeen et a1 June 15, 1943 2,357,551 Schlage Sept. 5, 1944 

